Alright, so I went on a bit of a quest for 'Seraphic' and the audiobook landscape is surprisingly fractured. The most widely available version is the one narrated by Elara Vance on Audible and Google Play Books. Vance's performance is competent, very clear and professional, but to me it felt a bit too... polished? It lacked the gritty, desperate undertone I always imagined for Kaelen's chapters.
Where it gets interesting is the indie circuit. There's a version floating around on a few podcast-style audiobook apps, narrated by someone credited as Marcus Thorne. It's not officially licensed as far as I can tell, and the audio quality isn't studio-perfect, but Thorne absolutely nails the cynicism of the older, mentor character. His voice has this wonderful, weary gravel to it that adds a whole new layer. You won't find it on the big platforms, though; I stumbled across it on a forum thread dedicated to ambient fantasy sounds.
Honestly, the 'best' depends entirely on what you value. For production value and easy access, stick with Vance. But if character immersion is your thing, the Thorne version, despite its DIY feel, might actually be the more memorable listen. I ended up buying both, which feels ridiculous to admit.